Tanjiro Kamado is the main protagonist of Demon Slayer. He is a young and caring boy who has not lost his compassion despite losing his family to a demon. He became a demon slayer not only to find a cure for his sister's demonification, but to keep others from experiencing his pain.
Most of the characters Tanjiro meets throughout the series like him. His kindness and friendly demeanor often draw people in, while other people end up respecting him after seeing his commitment to his goals. However, not everyone likes him. Some are actually put off by his personality, finding him annoying or downright aggravating.
10 Likes Him: Hotaru Haganezuka Likes Tanjiro But Won't Admit It
Hotaru is a swordsmith that makes swords for Tanjiro. Tanjiro is the only person who trusts him to make a sword, as Hotaru chased off his other customers with his violent tendencies.
Although he does threaten and attack Tanjiro each time he loses or breaks his sword, Hotaru really enjoys making swords for him. He is so dedicated to his craft that he tirelessly worked on making Tanjiro's new blade perfect for him even when he was getting attacked by one of Muzan's strongest demons.
9 Dislikes Him: Obanai Iguro Doesn't Like Tanjiro's Friendly Nature
Tanjiro is naturally friendly to most of the people that he meets. Even when someone doesn't like him, or if he doesn't like someone, he goes out of his way to be polite. Obanai is the exact opposite, showing an open dislike for anyone who isn't Kagaya Ubuyashiki or Mitsuri Kanroji.
He has feelings for Mitsuri, so he immediately hated him when Obanai heard her talking about Tanjiro. The training he gave Tanjiro was brutal, and when Tanjiro was finished with his training, Obanai warned him to never talk to Mitsuri again.
8 Likes Him: Muichiro Tokito Learned Compassion From Tanjiro
Muichiro was initially cold and seemed to display little emotion or sympathy. That changed after Tanjiro advised him to help people. Muichiro chose to follow this advice, and as a result, one of the people that he saved ended up saving his life in turn.
Muichiro's memories of his past also came back, and his relearned compassion made him develop a soft spot for Tanjiro. He even showed clear favoritism towards Tanjiro during their training sessions, allowing Tanjiro to progress faster than all of the other trainees.
7 Dislikes Him: Sanemi Shinazugawa Thinks Tanjiro Is Too Nosy
Sanemi and Tanjiro outright told each other that they didn't accept the other. Sanemi strongly disliked how blunt and straightforward Tanjiro could be, so he mercilessly hit him multiple times during their training session.
When Sanemi tried to attack Genya, Tanjiro jumped in to stop them. The ensuing fight got out of hand, and as a result, the two weren't allowed anywhere near each other. Tanjiro can't help but speak up if he sees any sort of sibling conflict, and although Sanemi didn't want to admit it, Tanjiro understood Sanemi's true feelings towards his brother.
6 Likes Him: Nezuko Kamado Would Protect Tanjiro With Her Life
Nezuko is Tanjiro's younger sister. The two share an immensely strong bond, which only grew more powerful after they lost the rest of their family. Not only is Nezuko able to resist eating him after becoming a demon, but she always rushes to protect him. She is even willing to go into the sunlight for him, even when it could mean her end.
The two are completely devoted to each other and take turns saving each other throughout the series. Although Nezuko says little throughout the series, her love for her brother is clear.
5 Dislikes Him: Akaza Hates Tanjiro For Reminding Him Of His Past
Akaza had long forgotten about his memories as a human because he didn't want to remember his past. Tanjiro's words brought back those memories, which enraged the demon. When Tanjiro called Akaza a coward, Akaza was furious. He hated cowards, as cowardly people decided to poison the people that he loved.
Akaza also hated weakness, which was something he saw in Tanjiro from the moment that they met. His fight against Tanjiro unlocked the rest of his suppressed memories and allowed him to finally accept his death. Akaza hated Tanjiro as a demon, but he only let go of that hatred when he finally remembered his humanity.
4 Likes Him: Inosuke Hashibira Is One Of Tanjiro's Closest Friends
Inosuke saw Tanjiro as a rival at first, but after the two fought together for a while, he grew to respect him. Tanjiro encourages Inosuke to become better, and he even starts to act less like a wild animal as the series progresses. He even develops a deep compassion for multiple characters due to Tanjiro's good influence.
Inosuke still tends to lose his temper a lot of the time, but Tanjiro usually knows what to say to calm him down. At some point, Inosuke realizes that he can no longer find the will to fight Tanjiro.
3 Dislikes Him: Muzan Kibutsuji Hated Tanjiro Because Of His Earrings
Tanjiro wore hanafuda earrings, which reminded Muzan of Yoriichi Tsugikuni. Yoriichi was the warrior that came close to killing him years ago, and Muzan never got over the humiliation of having to flee from a human. On top of this, Tanjiro promised Muzan that he would kill him. Muzan grew furious at this and ordered multiple demons to kill him.
Muzan is extremely prideful, and if he doesn't get what he wants, he flies into a rage. Tanjiro killed a fair number of Muzan's demons, and he ultimately led to Muzan's demise.
2 Likes Him: Kanao Tsuyuri Was Touched By Tanjiro's Kindness
Kanao didn't seem to have particularly strong feelings about him at first. Like Shinobu, she had a smile on her face most of the time, making her difficult to read. She trained with Tanjiro and had the upper hand for a while. When Tanjiro finally won one of their training games, he respectfully didn't dump the tea on her.
Tanjiro encouraged Kanao to make her own decisions, which allowed her to think for herself without relying on a coin flip. She cares for Tanjiro, showing concern whenever he gets injured, and she even risked her remaining vision to save him.
1 Dislikes Him: Rui Was Envious Of Tanjiro and Nezuko
After losing his parents, Rui tried to recreate the familial bonds that he missed. He fostered a family, but in reality, he treated them cruelly. When he saw Nezuko and Tanjiro's bond, he immediately grew envious and wanted Nezuko for himself. He hated Tanjiro's claims that his family bonds were a lie and Tanjiro's refusal to hand Nezuko over.
As their battle progressed, Rui became increasingly enraged, and despite his best efforts, he wasn't able to kill either of the siblings. It wasn't until his demise that he realized that he did have those familial bonds with his parents.